ENV-1010 Lecture Notes - Lecture 11: Doubling Time, Exponential Growth
13 Sep 2016
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Document Summary
Human population and demographics: population individuals in the same place at the same time. Population= (birth date + immigration) (death rate + emigration) Rate of population change: birth rate or crude birth rate. The number of live births per 1000 people per year: death rate or crude death rate. The number of deaths per 1000 people per year. How fast is the world"s population growing: world rates: 1. 25: % = birth rate death rate. Rate dropped from 2. 2% to 1. 25% (half) 2014 added 80 million people (translates to adding population of new. World"s population rate: is lower but world population continues to increase, estimated that we have 219,000 more people each day. That is equal to the population of winston-salem or durham every day: 98% of these are in developing countries. Doubling time: how long it takes for a population growing at a specified rate to double its size, takes less time to double o, rule of 70 .
